Punchinq-machine



J. M. LONG. PUNCHING MACHINE.

1N0 Model.)

No. 547,554. Patented Oct. 8, 1895.

Inventor Attorney WWM. S

Wald;

UNIT In) STATES PATENT OFFICE.

JOHN a. tone, or nannxros, onto.

PUNCHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 547,554, dated October8, 1895.

Application filed June 8,1806.

1'0 (116 It'll-01111 (It may concern:

lie it known thatI, JOHN M. l.i).\'u,of llamilton, liutlor county,()hio, have invented certain new and useful Improvements inPunching-Machines, of which the following isa specillcation.

This invention pertains to improvements in that class of Self-feedingpunching-machinos in which the sheet to be punched is secured to alongitudinally-moving table, which is advanced by suitable mechanism ateach stroke of the punch, so as to produce a row of preperly-spacedholes. I do not show or describe the table or its supports, as they maybe of any usual or well-known form of structure.

My in'iprovcmcnts will be readily understood from the followingdescription, taken in connection with the accompanyingdrawings, inwhich- Figure l is a side elevation of a punchingmachino embodying myimprovements; Fig. 3,9. front elevation of the same; Fig. 3, a frontelevation, on an enlarged scalo, of the pawlbar, and Fig. 4 a rearelevation of the pawl.

in the drawings, 1 indicates the body of tho punching-machine, ofordinary construction; :2, the punch-ram at the front of the body of themachine; 13, the die; 4, the cam-shaft extending from the ram throughand rearwardly beyond the body of the machine; 5, a notched rack to besecured to the usual traveling table which supports the work, this rackhaving notches spaced in accordance with the de sired spacing of thepunching; ti, a horizontal guideway rigidly secured to the body of themachine near to and parallel with the rackbar 5, this guidcway being at.right angles to the movement of punch-ram 2; 7, a pawl-bar arranged toslide in the guideway ti; b, a pawl pivoted to pawl-bar 7, its pointengaging the rack-bar :3; a rock-shaft supported by the body of themachine parallel with cam-shaft i and having its forward end about inthe plane of pawl-bar 7; 10, a link positively eugaging crank-arms onthe rear ends of shaft 9 and shaft-t, whereby the movement of shaft 4,in operating the punch-ram, results in retatory motion of rock-shaft fl;11, an arm fast on the front end of shaft i); 12, a link connectlngthisarm with pawl-bar 7, whereby the movement of the rock-shaft resultsin reciprocations of the pawl-bar and pawl; 13,11 camshaped recess inthe rear face of pawl 8; 14, a rod sliding on pawl-bar 7 and having atits inner end a projection engaging within the .inclined recess 13 ofthe pawl, and 15 an adjustable crank-arm on shafti for altering thedegree of angular motion of rock-shaft!) and, consequently, the strokeof pawl S in both its directions of motion.

It will be obvious that at each stroke of the punch the pawl-bar 7 ispositively reciprocated, and that rack-bar 5 will be advanced one tooth.The rack-bar will be notched in correspondence with the desired spacingto be produced in the punching. Crank 15 is to be adjusted to such throwthat pawi S will have a stroke in excess of one space of toothing inrack-bar 5, but not equal to two of the spacings. Great accuracy ofadjustment of movement for the pawl is not therefore requisite, it beingonly necessary that. the rack-bar shall be accurate. Selective rack-barsmay be provided, one for each desired character of spacing, each barbeing provided with one notch or tooth for each punching, or, ifdesired,the rack-bar may have its notches spaced in accordance with a givenminimum spacing desired in the punching. \Vith such a bar,such'minimumspacing of punching maybe produced, or the spacing may be increased inmultiples of that minimum spacing by adjusting crank 15 to cause thepawl to have a stroke in excess of the distance represented by thenumberof teeth rcpresenting the desired space, but not equal to the nexthigher number of teeth. l-ly this means one rack-bar will answer for agiven minimum of spacing and multiples thereof. For special work callingfor irregular spacing the rack-bar will be notched accordingly, and thepawl-stroke will be adjusted to be in excess of maximum spacing, but note ual to any two contiguous spaces.

lly pulling upon rod 14 the pawl is lifted out of engagement with therack-bar and sustained in an idle position, thus permitting movement tobe given to the table of the machine by hand in the usual way.

I claim as my invention- 1. In a punching-machine, the combination,substantially as set forth, of the machine body, the punch ram mountedin the front thereof, the cam-shaftextending from the ram through andrearwardly beyond the body, the adjust rigidly supported thereby atright angles to the movement of the punch-ram of the machine, a pawl-barsliding in said guideway and arranged to be reciprocated from the aetuating mechanism of the maehine,a pawl pivoted to the pawl-bar and having acam-shaped recess, and a rod sliding in said pawl-bar and having aprojection engaging said recess.

JOHN M. L NG. Witnesses:

J. W. SEE, l. Sana-nu;

